Ok, but is it really a problem?
To my mind it is in the webstructure.xml result because when queried without the "about" parameter, "out" and "in" <references> tag can contain multiple host references lists. So each <domain> tag has to specify which host it is about.

In the HostBrowser.xml structure, <inbount> and <outbound> lists are only produced for the path you specified, so I guess we can assume that path is known when parsing the result...